Improve versioning

Makefile

@@ -1,4 +1,5 @@
 .DEFAULT_GOAL:=help
+VERSION=$(shell git describe --tags --abbrev=0)
 
 help:
 	@awk 'BEGIN {FS = ":.*##"; printf "Usage: make \033[36m<target>\033[0m\n"} /^[a-zA-Z_-]+:.*?##/ { printf "  \033[36m%-10s\033[0m %s\n", $$1, $$2 } /^##@/ { printf "\n\033[1m%s\033[0m\n", substr($$0, 5) } ' $(MAKEFILE_LIST)
@@ -12,7 +13,8 @@ vet:  ## Vet to find also sublte issues in the code
 
 ##@ Build
 build: ## Build application
-	go build -ldflags "-s -w" -o dist/
+	go build -ldflags="-s -w -X 'github.com/rjuer/cidr/cmd.version=$(VERSION)'" -o dist/
+	@# go build -ldflags "-s -w" -o dist/
 
 ##@ Test
 test: ## Run tests in all packages and generate coverage report

cmd/root.go

@@ -6,11 +6,13 @@ import (
 	"github.com/spf13/cobra"
 )
 
+var version string
+
 var rootCmd = &cobra.Command{
 	Use:     "cidr",
 	Short:   "Application to operate with CIDR blocks",
 	Long:    `Handles basic operations related to CIDR blocks.`,
-	Version: "v0.1.0",
+	Version: version,
 }
 
 func Execute() {